update_group_preferences · Mealie MCP Server MCP

WHAT IT DOES

What update_group_preferences does on Mealie MCP Server

AI agents use update_group_preferences to create or update resources in Mealie MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mealie MCP Server environment.

WHY IT NEEDS A POLICY

Why update_group_preferences needs a policy

This tool creates or modifies data reversibly—group preferences can be updated and potentially reverted. It affects shared group settings rather than irreversible deletions or financial transactions, placing it in the Write category.

From the tool's definition Tool name and description indicate modification of group preferences: 'Update current group preferences' modifies existing configuration data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_group_preferences Rate-limited

update_group_preferences stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "update_group_preferences": {
      "limits": [
        {
          "counter": "update_group_preferences_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mealie MCP Server, so you can run agents against it safely.

FAQ

Questions about update_group_preferences

What does the update_group_preferences tool do? +

Update current group preferences. It is categorised as a Write tool in the Mealie MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_group_preferences? +

Register the Mealie MCP Server MCP server in PolicyLayer and add a rule for update_group_preferences: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Mealie MCP Server. Nothing to install.

What risk level is update_group_preferences? +

update_group_preferences is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit update_group_preferences? +

Yes. Add a rate_limit block to the update_group_preferences rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block update_group_preferences completely? +

Set action: deny in the PolicyLayer policy for update_group_preferences. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides update_group_preferences? +

update_group_preferences is provided by the Mealie MCP Server MCP server (nikopol666/mealie-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.